Sodium Iron(II) Pyrosilicate Na2Fe2Si2O7: A Potential Cathode Material in the Na2O-FeO-SiO2 System

Panigrahi, Abhishek; Nishimura, Shin Ichi; Shimada, Taro; Watanabe, Eriko; Zhao, Wenwen; Oyama, Gosuke; Yamada, Atsuo

doi:10.1021/acs.chemmater.7b00764

Cited by 19 publications

(19 citation statements)

References 49 publications

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“…Electrochemical testing indicated, however, that the electrochemical activity could be improved in subsequent studies. [206] Considering the high Coulombic efficiency and high reversible capacity, this iron sulfate composite deserves more exploration to achieve a good understanding of the local structure as well as the design of the morphology. Na 2 MnSiO 4 is another great choice for a low-cost silicatebased electrode for SIBs.…”

Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

High‐Abundance and Low‐Cost Metal‐Based Cathode Materials for Sodium‐Ion Batteries: Problems, Progress, and Key Technologies

Chen

Liu

Wang

et al. 2019

Advanced Energy Materials

224

149

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Recently, room-temperature stationary sodium-ion batteries (SIBs) have received extensive investigations for large-scale energy storage systems (EESs) and smart grids due to the huge natural abundance and low cost of sodium. The SIBs share a similar "rocking-chair" sodium storage mechanism with lithium-ion batteries; thus, selecting appropriate electrodes with a low cost, satisfactory electrochemical performance, and high reliability is the key point for the development for SIBs. On the other hand, the carefully chosen elements in the electrodes also largely determine the cost of SIBs. Therefore, earth-abundantmetal-based compounds are ideal candidates for reducing the cost of electrodes. Among all the high-abundance and low-cost metal elements, cathodes containing iron and/or manganese are the most representative ones that have attracted numerous studies up till now. Herein, recent advances on both ironand manganese-based cathodes of various types, such as polyanionic, layered oxide, MXene, and spinel, are highlighted. The structure-function property for the iron-and manganese-based compounds is summarized and analyzed in detail. With the participation of iron and manganese in sodium-based cathode materials, real applications of room-temperature SIBs in large-scale EESs will be greatly promoted and accelerated in the near future.

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Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

High‐Abundance and Low‐Cost Metal‐Based Cathode Materials for Sodium‐Ion Batteries: Problems, Progress, and Key Technologies

Chen

Liu

Wang

et al. 2019

Advanced Energy Materials

224

149

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“…In early 2017, Panigrahi et al reported on a new Na 2 Fe 2 Si 2 O 7 orthosilicate, which was synthesized via a classic solid-sate reaction. [185] Density functional theory (DFT) calculations predicted redox voltages between 2.23 and 2.56 V versus Na/Na + , which lie in the electrolyte stability window and thus make this compound a potential cathode material for Na-ion batteries. Na 2 Fe 2 Si 2 O 7 crystallizes in the monoclinic P12 1 /n1 unit cell and consists of 1D chains, which are built out of corner-and edge-sharing distorted FeO 5 bipyramids and FeO 4 tetrahedra (Figure 16a).…”

Section: Orthosilicate Na 2 Fe 2 Si 2 Omentioning

confidence: 99%

Section: Compositional Strategymentioning

confidence: 99%

Polyanionic Insertion Materials for Sodium‐Ion Batteries

Barpanda

Lander

Nishimura

et al. 2018

Advanced Energy Materials

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337

185

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future. [1][2][3] To avoid this scenario, Na-ion batteries can play a vital role. Contrary to Li, Na has abundant natural resources with even geographic distribution. In addition to being the fifth-most abundant element in earth's crust, the Na charge carrier is also the second lightest alkali element in the periodic table. In this context, mammoth effort has been geared to build efficient Na-ion batteries. 2D layered oxides are the most important category of cathode materials, which has been proven by their dominance in commercial Li-ion batteries. Although the only difference is the intercalation ion, the electrochemical behavior and structure transformation of Na analogs are very different to that in Li-ion batteries. These are mainly caused by the larger size of Na, which can stabilize the layered structure (empirical stability criterion for ABO 2 : r B /r A <0.86 for α-NaFeO 2 type structure) and thus prevent Na from occupying tetrahedral sites and promote Na cation ordering. [31] NaMO 2 compounds can retain the layered structure for all 3d transition elements M, whereas Co and Ni are the exclusive 3d transition metals that can offer ground state stability of layered structure of LiMO 2 . Thereby, intensive survey for a variety of NaMO 2 compounds was performed. [4][5][6]32] However, even with the inherently stable structural nature of NaMO 2 compounds, they usually suffer from a slopy voltage profile distributed over a wide potential range at lower average voltage (at least 0.3 V and in many cases over 0.5 V) as compared to the Li analog, identifying only a few complicated compounds that can generate >3.5 V versus Na/Na + .Development of high voltage cathode materials is of paramount importance for Na batteries, bearing in mind the relative difference in anode potential of Li/Li + : −3.03 V and Na/ Na + : −2.71 V versus NHE. With an essential lack of high-voltage layered cathode material, polyanion compounds form a major stream toward the stable cathode materials operating over 3.5 V in Na batteries. Light and small polyanion units such as (SO 4 ) 2− , (PO 4 ) 3− , (BO 3 ) 3− , (SiO 4 ) 4− , which have also been widely explored as major components in Li-ion battery cathodes, offer two major functions; i) raising the redox potential largely as compared to the simple oxides with identical redox couple, and ii) providing inherent safety to the battery system. These two very important features led olivine LiFePO 4 to a great commercial success in the Li battery market over a decade ago, [35,37,38,63] proving that additional atoms X (X = P in this case), other than Efficient energy storage is a driving factor propelling myriads of mobile electronics, electric vehicles and stationary electric grid storage. Li-ion batteries have realized these goals in a commercially viable manner with ever increasing penetration to different technology sectors across the globe. While these electronic devices are more evident and appealing to consumers, there has been a growing concern for micro-to-mega grid storage systems. Ove...

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“…Nevertheless, most of the polyanionic compounds suffer from inherent low electronic conductivity, and therefore a well-decorated carbon coating and network are essential for their C-rate performance. According to the previous report, the majority of polyanionic composites possess one-or two-dimensional (1D or 2D) sodium diffusion pathways (Kim et al, 2013(Kim et al, , 2015Chen M. et al, 2017;Panigrahi et al, 2017;Chen et al, 2018;Fang et al, 2018;Zhu et al, 2019). The low-dimensional sodium diffusion pathways cannot guarantee satisfactory C-rate capabilities, especially in low temperature environments.…”

Section: Polyanionic Compounds With 3d Na + Diffusion Pathwaysmentioning

confidence: 99%

Building High Power Density of Sodium-Ion Batteries: Importance of Multidimensional Diffusion Pathways in Cathode Materials

Chen¹,

Zhang²,

Xing³

et al. 2020

Front. Chem.

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Emerging sodium-ion batteries (SIBs) devices hold the promise to leapfrog over existing lithium-ion batteries technologies with respect to desirable power/energy densities and the abundant sodium sources on the earth. To this end, the discoveries on novel cathode materials with outstanding rate capabilities are being given high priority in the quest to achieve high power density SIBs devices, and the multi-dimensional Na + migration pathways with low diffusion energy barriers are crucial. In light of this, the recent development of Prussian blue analogs and sodium superionic conductor (NASICON)-type materials with 3D Na + diffusion pathways for building high power density NIBs are provided in this perspective. Ultimately, the future research directions to realize them for real applications are also discussed.

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Sodium Iron(II) Pyrosilicate Na₂Fe₂Si₂O₇: A Potential Cathode Material in the Na₂O-FeO-SiO₂ System

Cited by 19 publications

References 49 publications

High‐Abundance and Low‐Cost Metal‐Based Cathode Materials for Sodium‐Ion Batteries: Problems, Progress, and Key Technologies

High‐Abundance and Low‐Cost Metal‐Based Cathode Materials for Sodium‐Ion Batteries: Problems, Progress, and Key Technologies

Polyanionic Insertion Materials for Sodium‐Ion Batteries

Building High Power Density of Sodium-Ion Batteries: Importance of Multidimensional Diffusion Pathways in Cathode Materials

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